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[Emacs-diffs] Changes to emacs/lisp/gnus/mml-smime.el [emacs-unicode-2]
From: |
Miles Bader |
Subject: |
[Emacs-diffs] Changes to emacs/lisp/gnus/mml-smime.el [emacs-unicode-2] |
Date: |
Thu, 09 Sep 2004 07:51:17 -0400 |
Index: emacs/lisp/gnus/mml-smime.el
diff -c /dev/null emacs/lisp/gnus/mml-smime.el:1.2.2.1
*** /dev/null Thu Sep 9 09:38:12 2004
--- emacs/lisp/gnus/mml-smime.el Thu Sep 9 09:36:25 2004
***************
*** 0 ****
--- 1,201 ----
+ ;;; mml-smime.el --- S/MIME support for MML
+ ;; Copyright (c) 2000, 2001, 2003 Free Software Foundation, Inc.
+
+ ;; Author: Simon Josefsson <address@hidden>
+ ;; Keywords: Gnus, MIME, S/MIME, MML
+
+ ;; This file is part of GNU Emacs.
+
+ ;; GNU Emacs is free software; you can redistribute it and/or modify
+ ;; it under the terms of the GNU General Public License as published
+ ;; by the Free Software Foundation; either version 2, or (at your
+ ;; option) any later version.
+
+ ;; GNU Emacs is distributed in the hope that it will be useful, but
+ ;; WITHOUT ANY WARRANTY; without even the implied warranty of
+ ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ ;; General Public License for more details.
+
+ ;; You should have received a copy of the GNU General Public License
+ ;; along with GNU Emacs; see the file COPYING. If not, write to the
+ ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ ;; Boston, MA 02111-1307, USA.
+
+ ;;; Commentary:
+
+ ;;; Code:
+
+ (require 'smime)
+ (require 'mm-decode)
+ (autoload 'message-narrow-to-headers "message")
+
+ (defun mml-smime-sign (cont)
+ (when (null smime-keys)
+ (customize-variable 'smime-keys)
+ (error "No S/MIME keys configured, use customize to add your key"))
+ (smime-sign-buffer (cdr (assq 'keyfile cont)))
+ (goto-char (point-min))
+ (while (search-forward "\r\n" nil t)
+ (replace-match "\n" t t))
+ (goto-char (point-max)))
+
+ (defun mml-smime-encrypt (cont)
+ (let (certnames certfiles tmp file tmpfiles)
+ ;; xxx tmp files are always an security issue
+ (while (setq tmp (pop cont))
+ (if (and (consp tmp) (eq (car tmp) 'certfile))
+ (push (cdr tmp) certnames)))
+ (while (setq tmp (pop certnames))
+ (if (not (and (not (file-exists-p tmp))
+ (get-buffer tmp)))
+ (push tmp certfiles)
+ (setq file (mm-make-temp-file (expand-file-name "mml."
+ mm-tmp-directory)))
+ (with-current-buffer tmp
+ (write-region (point-min) (point-max) file))
+ (push file certfiles)
+ (push file tmpfiles)))
+ (if (smime-encrypt-buffer certfiles)
+ (progn
+ (while (setq tmp (pop tmpfiles))
+ (delete-file tmp))
+ t)
+ (while (setq tmp (pop tmpfiles))
+ (delete-file tmp))
+ nil))
+ (goto-char (point-max)))
+
+ (defun mml-smime-sign-query ()
+ ;; query information (what certificate) from user when MML tag is
+ ;; added, for use later by the signing process
+ (when (null smime-keys)
+ (customize-variable 'smime-keys)
+ (error "No S/MIME keys configured, use customize to add your key"))
+ (list 'keyfile
+ (if (= (length smime-keys) 1)
+ (cadar smime-keys)
+ (or (let ((from (cadr (funcall gnus-extract-address-components
+ (or (save-excursion
+ (save-restriction
+ (message-narrow-to-headers)
+ (message-fetch-field "from")))
+ "")))))
+ (and from (smime-get-key-by-email from)))
+ (smime-get-key-by-email
+ (completing-read "Sign this part with what signature? "
+ smime-keys nil nil
+ (and (listp (car-safe smime-keys))
+ (caar smime-keys))))))))
+
+ (defun mml-smime-get-file-cert ()
+ (ignore-errors
+ (list 'certfile (read-file-name
+ "File with recipient's S/MIME certificate: "
+ smime-certificate-directory nil t ""))))
+
+ (defun mml-smime-get-dns-cert ()
+ ;; todo: deal with comma separated multiple recipients
+ (let (result who bad cert)
+ (condition-case ()
+ (while (not result)
+ (setq who (read-from-minibuffer
+ (format "%sLookup certificate for: " (or bad ""))
+ (cadr (funcall gnus-extract-address-components
+ (or (save-excursion
+ (save-restriction
+ (message-narrow-to-headers)
+ (message-fetch-field "to")))
+ "")))))
+ (if (setq cert (smime-cert-by-dns who))
+ (setq result (list 'certfile (buffer-name cert)))
+ (setq bad (format "`%s' not found. " who))))
+ (quit))
+ result))
+
+ (defun mml-smime-encrypt-query ()
+ ;; todo: add ldap support (xemacs ldap api?)
+ ;; todo: try dns/ldap automatically first, before prompting user
+ (let (certs done)
+ (while (not done)
+ (ecase (read (gnus-completing-read-with-default
+ "dns" "Fetch certificate from"
+ '(("dns") ("file")) nil t))
+ (dns (setq certs (append certs
+ (mml-smime-get-dns-cert))))
+ (file (setq certs (append certs
+ (mml-smime-get-file-cert)))))
+ (setq done (not (y-or-n-p "Add more recipients? "))))
+ certs))
+
+ (defun mml-smime-verify (handle ctl)
+ (with-temp-buffer
+ (insert-buffer-substring (mm-handle-multipart-original-buffer ctl))
+ (goto-char (point-min))
+ (insert (format "Content-Type: %s; " (mm-handle-media-type ctl)))
+ (insert (format "protocol=\"%s\"; "
+ (mm-handle-multipart-ctl-parameter ctl 'protocol)))
+ (insert (format "micalg=\"%s\"; "
+ (mm-handle-multipart-ctl-parameter ctl 'micalg)))
+ (insert (format "boundary=\"%s\"\n\n"
+ (mm-handle-multipart-ctl-parameter ctl 'boundary)))
+ (when (get-buffer smime-details-buffer)
+ (kill-buffer smime-details-buffer))
+ (let ((buf (current-buffer))
+ (good-signature (smime-noverify-buffer))
+ (good-certificate (and (or smime-CA-file smime-CA-directory)
+ (smime-verify-buffer)))
+ addresses openssl-output)
+ (setq openssl-output (with-current-buffer smime-details-buffer
+ (buffer-string)))
+ (if (not good-signature)
+ (progn
+ ;; we couldn't verify message, fail with openssl output as message
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info "Failed")
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-details
+ (concat "OpenSSL failed to verify message integrity:\n"
+ "-------------------------------------------\n"
+ openssl-output)))
+ ;; verify mail addresses in mail against those in certificate
+ (when (and (smime-pkcs7-region (point-min) (point-max))
+ (smime-pkcs7-certificates-region (point-min) (point-max)))
+ (with-temp-buffer
+ (insert-buffer-substring buf)
+ (goto-char (point-min))
+ (while (re-search-forward "-----END CERTIFICATE-----" nil t)
+ (when (smime-pkcs7-email-region (point-min) (point))
+ (setq addresses (append (smime-buffer-as-string-region
+ (point-min) (point)) addresses)))
+ (delete-region (point-min) (point)))
+ (setq addresses (mapcar 'downcase addresses))))
+ (if (not (member (downcase (or (mm-handle-multipart-from ctl) ""))
addresses))
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info "Sender address forged")
+ (if good-certificate
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info "Ok (sender authenticated)")
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-info "Ok (sender not trusted)")))
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-details
+ (concat "Sender claimed to be: " (mm-handle-multipart-from ctl) "\n"
+ (if addresses
+ (concat "Addresses in certificate: "
+ (mapconcat 'identity addresses ", "))
+ "No addresses found in certificate. (Requires OpenSSL 0.9.6
or later.)")
+ "\n" "\n"
+ "OpenSSL output:\n"
+ "---------------\n" openssl-output "\n"
+ "Certificate(s) inside S/MIME signature:\n"
+ "---------------------------------------\n"
+ (buffer-string) "\n")))))
+ handle)
+
+ (defun mml-smime-verify-test (handle ctl)
+ smime-openssl-program)
+
+ (provide 'mml-smime)
+
+ ;;; arch-tag: f1bf94d4-f2cd-4c6f-b059-ad69492817e2
+ ;;; mml-smime.el ends here
- [Emacs-diffs] Changes to emacs/lisp/gnus/mml-smime.el [emacs-unicode-2],
Miles Bader <=